91032967577 has 4 divisors (see below), whose sum is σ = 91067231796. Its totient is φ = 90998703360.

The previous prime is 91032967559. The next prime is 91032967589. The reversal of 91032967577 is 77576923019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77576923019 = 29 ⋅2675066311.

It can be written as a sum of positive squares in 2 ways, for example, as 66566064016 + 24466903561 = 258004^2 + 156419^2 .

It is a cyclic number.

It is not a de Polignac number, because 91032967577 - 2¹⁴ = 91032951193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91032967517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17128124 + ... + 17133437.

It is an arithmetic number, because the mean of its divisors is an integer number (22766807949).

Almost surely, 2^91032967577 is an apocalyptic number.

It is an amenable number.

91032967577 is a deficient number, since it is larger than the sum of its proper divisors (34264219).

91032967577 is a wasteful number, since it uses less digits than its factorization.

91032967577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34264218.

The product of its (nonzero) digits is 5000940, while the sum is 56.

The spelling of 91032967577 in words is "ninety-one billion, thirty-two million, nine hundred sixty-seven thousand, five hundred seventy-seven".